Vuelveme a querer

If that's some sort of racing fairing fitted, it could be practically anything. I agree. And it looks like thin cardboard... Homemade? (and I mean that literally, cut out and glued together on this guy's dining room table!) With a 4-star rating there must be many other view of it...

2004 Yamaha YZF-R1 with racing fairings --- http://www.street-fighters.eu/quality/R1%2005/R1abe_03.jpg